This is a Dukoff Supersonic 3 made for Buescher that Brian Powell opened up to a .072. These mouthpieces were made with a very high quality rubber and the blank used for them was also used by Geo. M. Bundy and Selmer Elkhart NY. This piece has a slight rollover baffle, curved side walls, and a medium round chamber. This is a great alto piece for the money.